Editing aspx/ascx files randomly disabled in Visual Studio 2010?

Question

I'll be debugging a site in Visual Studio 2010 and editing an *.aspx or *.ascx file, and without warning, it will lock up so that I can't edit it. There's no message or anything, I just can't type or make any changes.

The only way to start editing again is to stop debugging, close the editing window, and then find whatever file I was working on and reopen it. It's a huge pain in the you-know-what.

My colleagues are experiencing the same thing, so it's apparently not something with my particular setup.

What's the explanation, and how can we make it stop?

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Note 1: I've reported this to Microsoft here. If you've experienced this as well, please go there and vote up the bug report.

Note 2: This is not VSS-related, at least in my case. We use VisualSVN, which doesn't use file-system-level locking to mark files as checked out.

Answer 1

Finally Microsoft came with a solution this year, you can download the fix here:

http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=40811

Answer 2

I've found a temporary workaround-solution: Right-click on the file and select "Open with...". Now select "Source Code (Text) Editor" and you can edit the file again but without IntelliSense :-( But you won't need an external editor.

Nevertheless we still have to wait for Microsoft to find a better solution.